#str{
    height: 120px;
    width:868px;
    margin-left: -10px;
    padding-left: 3px;
    padding-top: 5px;
    font-family: "Microsoft Yahei","Helvetica Neue",Helvetica,Arial,sans-serif;
    font-size: 14px;
}
#btn{
    position: relative;
    margin-top: 10px;
    margin-left: 725px;
    height: 38px;
    width:136px;
    background: #999;
    color: #fff;
}
.input,#btn{
    font-family: "Microsoft Yahei","Helvetica Neue",Helvetica,Arial,sans-serif;
}